It steams from the vents when the heat is on, and drips in to the foot well on the passenger side. I can't afford to have it replaced just yet, and can't get my mechanic to bypass it for about another week. Is it safe to drive it as long as I keep an eye on the coolant levels and radiator temp? I only use it to go to and from work, which is only about 12 miles from home. Thanks.